I’m getting phone calls from people who say they’ve received dozens of phone calls from my number. I believe someone is using this number through other means and is scamming people. Anything I can do about this? T mobile was not helpful and didn’t seem to understand what’s happening.

It sounds like someone may be spoofing with your number, unfortunately the options of what to do are pretty limited outside of waiting for it to die off, or changing your number as was suggested above.